Treadwear marking is assigned by a grade of 100. If the subject tire gets a grade of 200, it can be expected to last twice as long as the control tire; a tire with a grade of 80 usually is less durable. Right now, the highest marked associated with the tread wear rating is 700.
Traction grades range from AA (the best) to C (the worst). The traction test measures stopping ability on wet pavement. A tire with an AA traction grade can stop on wet pavement in about 30 percent less distance than a tire with a C grade.
Temperature grades range from A (the best) to C (the worst). A tire with an A grade can be expected to have three times more resistance to heat buildup than one with a C grade.
The results of these tests are used to assign each model of tire a UTQG (Uniform Tire Quality Grade) rating. This indicates not only its durability but also its traction and heat resistance levels.
Tires are rated using three numerical values that indicate their performance in each category: (1) treadwear, (2) traction, and (3) temperature resistance.
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What is the difference between tire treadwear rating 600 and 300?
The difference between a tire with a treadwear rating of 600 and 300 is that the 600 rated tire will last twice as long before it needs to be replaced. Treadwear rating is a method of comparing the durability of tires. The higher the number, the longer a tire should last.
For example, if a tire with a treadwear rating of 400 lasts 10,000 miles, you can expect a tire with a treadwear rating of 200 to last 5,000 miles.
A tire treadwear rating of 600 will last more than twice as long as a tire with a rating of 300. The higher the number the longer it will last. This is a very rough estimate and many other factors can affect the life of your tread.
In this case, dividing 600 by 300 gives you 2, which means that the tire with the 600 ratings should last twice as long as one with a 300 rating. It also means that it will cost more money due to its improved durability and performance.
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What is treadwear rating?
Treadwear ratings are designed to help you compare the relative wear of one tire with another. In other words, it gives you more information on how a tire will perform over time. These are subjective ratings based on a specific test track and driver, so they can’t be compared across brands.
Treadwear rating is a three-digit number that represents the tire’s wear rate. For example, for tires with a 150 treadwear rating, the manufacturer estimates that these tires will last 1.5 times longer than a tire with a 100 treadwear rating when both tires are driven under controlled conditions on a specified government test course.
The tests are conducted by trained drivers who drive an 11,000-mile course in San Angelo, Texas, where road tests have been conducted by the U.S. Department of Transportation since 1946.
The test uses different courses for passenger cars and light trucks to simulate various road surfaces and driving conditions that affect tire wear. The result is an estimate of how many miles you can expect to get from a tire before it reaches 2/32” of remaining tread depth.
How many miles does a 320 treadwear rating last?
The treadwear number is essentially a rating that tells you how long the tire will last. A rating of 320, for instance, means that if you were to put a brand new set of tires rated at 320 on your car, they should last 32,000 miles before they wear out.
Mileage will vary depending on your vehicle, driving style, and regional conditions. Several other factors can affect how long a tire will last.
But, there is a simple formula you can use to find out how many miles you can expect from a tire with a given treadwear rating. You’ll need to know:
Your annual mileage – or the number of miles you drive each year
The treadwear rating of the tire you’re considering – this is always shown in the tire size description
To help you understand what treadwear ratings mean, here’s an example that uses the most popular tire size in North America — P215/65R15. A passenger car tire with this size designation has a treadwear rating of 680, meaning it should last 68,000 miles under ideal circumstances.
How long do 800A treadwear tires last?
The most important thing to know is that the 800 A in your tire’s treadwear rating is not a guarantee of how long your tires will last.
The treadwear rating is really a comparison between different tires, not a guarantee of the life of a given tire. Tires with higher ratings may typically last longer than tires with lower ratings, but this is not always true.
The average treadwear of a passenger car tire is 600. Tires purchased new are given a treadwear rating that should be indicative of their longevity.
Tires with the highest treadwear number (600) could last twice as long as tires with the lowest treadwear number (100), depending on how you drive and other factors.
Treadwear ratings are based on government tests simulating 10,000 miles of driving. Actual wear life will vary greatly depending on factors including the speed of the vehicle, frequency of turns and braking, road conditions, weather conditions, vehicle type, vehicle load, and maintenance practices.
Is a 700 treadwear good?
It is important to look for the correct size and style for your vehicle. It will also be important to look at the treadwear rating number on the tire.
This number is the standard rating used by the U.S. government to determine how quickly a tread will wear out.
The higher this number, the longer the tire is expected to last.
A treadwear rating of 700 is good since it means that the tire has a rating that exceeds the norm. However, there are many different types of tires with treadwear ratings above 700, so it is important to research before purchasing a set of tires.
A treadwear rating of 700 or above can be found among all-season tires, high-performance tires, and touring tires, which are all common choices for a range of vehicles.
If you’re a casual driver, you may never come close to using your tires’ full tread life. You can expect a tire with a 700 treadwear rating to last about 6 times longer than a tire with a 100 rating, or 70,000 miles versus 10,000 miles.
What is a good treadwear rating?
Tire treadwear is measured by a government-required uniformity test that assigns a numerical rating, from 60 to 700. The higher the number the longer the tire should last under normal conditions.
Note that all tire manufacturers use this same rating system, so you can make an apples-to-apples comparison of tires across brands.
The U.S. Department of Transportation requires all new tires to have treadwear ratings, but it doesn’t require that these ratings be publicly disclosed by retailers. However, some retailers do print them on their price tags, and they are usually available on most retailers’ websites.
What makes a good treadwear rating? That depends on your needs and how much you’re willing to pay for tires. For example, if you drive a small sedan or subcompact, consumer ratings for 50,000 miles or more may be perfectly adequate for your needs.
But if you drive a performance car or like to go off-road, you might need tires designed to handle more punishment and achieve higher mileage ratings.
Is 800 a good treadwear rating?
It depends on what you’re looking for. If you are looking for a tire that will get the most miles out of a set, then look for tires with higher ratings.
However, if you are looking for a tire that will perform in wet conditions or provide enhanced traction on dry roads, then you might want to consider tires with lower ratings.
Treadwear grade is based on the wear rate of the tire type and size that has been tested under controlled conditions on a specified government test course.
For example, a tire graded 150 would wear one and one-half (1 1/2) times as well on the government course as a tire graded 100.
A treadwear grade of 800 is considered very good. A tire with a treadwear grade of 400 should wear twice as long as a tire with a grade of 200. In practice, however, tires do not usually perform exactly according to their treadwear grades.
What does treadwear 720 mean on a tire?
Treadwear 720 means that the tire will last on average 72,000 miles before the tread is worn to the point where you need to replace it.
The treadwear number is a measure of how long the tire’s tread should last under normal driving conditions. Tires with higher numbers do not wear faster than tires with lower numbers.
All other factors being equal, a tire with a higher treadwear number should last longer than a tire with a lower treadwear number.
The three tires on the left above all have the same basic design but with different compounds. The one on the right is an entirely different design, so it wears differently and has a different treadwear number.
Treadwear grades are a mathematical average of wear rates. A tire with a treadwear rating of 400 will, on average, last twice as long as a tire with a treadwear rating of 200.
A smoother-wearing tire typically has a higher treadwear grade than a more aggressive tire with more traction. A more aggressive tire can have a dramatically better grip in wet or dry conditions, but it wears out faster because its tread usually has more biting edges that are worn away as the tire rolls.
Frequently Asked Questions
1. What does treadwear mean on a tire?
Treadwear is usually part of a three-digit, two-letter grade on the sidewall of tires. This grade is derived after a test, comparing the tire to 100.
For example, if a tire has a treadwear rating of 200, it should last twice as long as the control tire in the test. If it has a rating of 50, then it should last half as long as the control tire.
2. What does a treadwear rating of 600 mean?
You will see several ratings on your tire. For example, a treadwear rating of 600. Only tires that meet the requirements of the Federal Treadwear Standards qualify for treadwear ratings.
These tires are rated by the U.S. Department of Transportation (DOT) on a scale of 100 to 1,000. The higher the rating, the longer the tire should last under normal driving conditions.
3. Is a 500 treadwear rating good?
The higher the treadwear number, the longer it should take for the tread to wear down. For example, a tire with a treadwear rating of 500 should last twice as long as a tire with a treadwear rating of 250.
4. Is a higher treadwear number better?
A higher treadwear number indicates the tire should last longer, but it doesn’t indicate the tire’s traction or handling.
The tire with a lower treadwear number may not last as long, but it will offer more traction in wet conditions and better cornering capabilities.
Conclusion
Treadwear ratings are determined by the manufacturer, they aren’t necessarily comparable from one brand to another. Some treadwear rating systems also include information about traction and temperature resistance.
For example, a tire might have a rating of “700 A A.” The first number (700) is the wear rating. The second A refers to traction; the best available is “AA,” with “A” being next.
The third A refers to temperature resistance; again, AA is best, followed by A and then B.
